So the more you spend, the smaller the percentage of gift card return?

If I spend $50, I get a card worth 10%, but if I spend $1000, I get a card worth 5% of my purchase.

WTF?

Most promos increase the percentage as you go up a "tier" in spending.

it is funky I agree but if you link to it via a discover card you a flat 5% off and then the quite strange gift card pattern. the sweet spot is a 250 purchase. but if you want a samsung 840 ssd you can preorder it for 379 get a 25 dollar gift card and 5% off with your discover card or about 340.